// VERSION: 2.3 LAST UPDATE: 11.07.2013
/*
 * Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
 *
 * Made by Wilq32, wilq32@gmail.com, Wroclaw, Poland, 01.2009
 * Website: http://jqueryrotate.com
 */

(function ($) {
  var supportedCSS, supportedCSSOrigin, styles = document.getElementsByTagName("head")[0].style,
    toCheck = "transformProperty WebkitTransform OTransform msTransform MozTransform".split(" ");
  var IE = (!+[1,]) ? 1 : 0
  for (var a = 0; a < toCheck.length; a++) if (styles[toCheck[a]] !== undefined) {
    supportedCSS = toCheck[a];
  }
  if (supportedCSS) {
    supportedCSSOrigin = supportedCSS.replace(/[tT]ransform/, "TransformOrigin");
    if (supportedCSSOrigin[0] == "T") supportedCSSOrigin[0] = "t";
  }

  // Bad eval to preven google closure to remove it from code o_O
  eval('IE = "v"=="\v"');

  jQuery.fn.extend({
    rotate: function (parameters) {
      if (this.length === 0 || typeof parameters == "undefined") return;
      if (typeof parameters == "number") parameters = {angle: parameters};
      var returned = [];
      for (var i = 0, i0 = this.length; i < i0; i++) {
        var element = this.get(i);
        if (!element.Wilq32 || !element.Wilq32.PhotoEffect) {

          var paramClone = $.extend(true, {}, parameters);
          var newRotObject = new Wilq32.PhotoEffect(element, paramClone)._rootObj;

          returned.push($(newRotObject));
        }
        else {
          element.Wilq32.PhotoEffect._handleRotation(parameters);
        }
      }
      return returned;
    },
    getRotateAngle: function () {
      var ret = [0];
      for (var i = 0, i0 = this.length; i < i0; i++) {
        var element = this.get(i);
        if (element.Wilq32 && element.Wilq32.PhotoEffect) {
          ret[i] = element.Wilq32.PhotoEffect._angle;
        }
      }
      return ret;
    },
    stopRotate: function () {
      for (var i = 0, i0 = this.length; i < i0; i++) {
        var element = this.get(i);
        if (element.Wilq32 && element.Wilq32.PhotoEffect) {
          clearTimeout(element.Wilq32.PhotoEffect._timer);
        }
      }
    }
  });

  // Library agnostic interface

  var Wilq32 = window.Wilq32 || {};
  Wilq32.PhotoEffect = (function () {

    if (supportedCSS) {
      return function (img, parameters) {
        img.Wilq32 = {
          PhotoEffect: this
        };

        this._img = this._rootObj = this._eventObj = img;
        this._handleRotation(parameters);
      }
    } else {
      return function (img, parameters) {
        this._img = img;
        this._onLoadDelegate = [parameters];

        this._rootObj = document.createElement('span');
        this._rootObj.style.display = "inline-block";
        this._rootObj.Wilq32 =
          {
            PhotoEffect: this
          };
        img.parentNode.insertBefore(this._rootObj, img);

        if (img.complete) {
          this._Loader();
        } else {
          var self = this;
          // TODO: Remove jQuery dependency
          jQuery(this._img).bind("load", function () {
            self._Loader();
          });
        }
      }
    }
  })();

  Wilq32.PhotoEffect.prototype = {
    _setupParameters: function (parameters) {
      this._parameters = this._parameters || {};
      if (typeof this._angle !== "number") {
        this._angle = 0;
      }
      if (typeof parameters.angle === "number") {
        this._angle = parameters.angle;
      }
      this._parameters.animateTo = (typeof parameters.animateTo === "number") ? (parameters.animateTo) : (this._angle);

      this._parameters.step = parameters.step || this._parameters.step || null;
      this._parameters.easing = parameters.easing || this._parameters.easing || this._defaultEasing;
      this._parameters.duration = 'duration' in parameters ? parameters.duration : parameters.duration || this._parameters.duration || 1000;
      this._parameters.callback = parameters.callback || this._parameters.callback || this._emptyFunction;
      this._parameters.center = parameters.center || this._parameters.center || ["50%", "50%"];
      if (typeof this._parameters.center[0] == "string") {
        this._rotationCenterX = (parseInt(this._parameters.center[0], 10) / 100) * this._imgWidth * this._aspectW;
      } else {
        this._rotationCenterX = this._parameters.center[0];
      }
      if (typeof this._parameters.center[1] == "string") {
        this._rotationCenterY = (parseInt(this._parameters.center[1], 10) / 100) * this._imgHeight * this._aspectH;
      } else {
        this._rotationCenterY = this._parameters.center[1];
      }

      if (parameters.bind && parameters.bind != this._parameters.bind) {
        this._BindEvents(parameters.bind);
      }
    },
    _emptyFunction: function () {
    },
    _defaultEasing: function (x, t, b, c, d) {
      return -c * ((t = t / d - 1) * t * t * t - 1) + b
    },
    _handleRotation: function (parameters, dontcheck) {
      if (!supportedCSS && !this._img.complete && !dontcheck) {
        this._onLoadDelegate.push(parameters);
        return;
      }
      this._setupParameters(parameters);
      if (this._angle == this._parameters.animateTo) {
        this._rotate(this._angle);
      }
      else {
        this._animateStart();
      }
    },

    _BindEvents: function (events) {
      if (events && this._eventObj) {
        // Unbinding previous Events
        if (this._parameters.bind) {
          var oldEvents = this._parameters.bind;
          for (var a in oldEvents) if (oldEvents.hasOwnProperty(a))
          // TODO: Remove jQuery dependency
            jQuery(this._eventObj).unbind(a, oldEvents[a]);
        }

        this._parameters.bind = events;
        for (var a in events) if (events.hasOwnProperty(a))
        // TODO: Remove jQuery dependency
          jQuery(this._eventObj).bind(a, events[a]);
      }
    },

    _Loader: (function () {
      if (IE)
        return function () {
          var width = this._img.width;
          var height = this._img.height;
          this._imgWidth = width;
          this._imgHeight = height;
          this._img.parentNode.removeChild(this._img);

          this._vimage = this.createVMLNode('image');
          this._vimage.src = this._img.src;
          this._vimage.style.height = height + "px";
          this._vimage.style.width = width + "px";
          this._vimage.style.position = "absolute"; // FIXES IE PROBLEM - its only rendered if its on absolute position!
          this._vimage.style.top = "0px";
          this._vimage.style.left = "0px";
          this._aspectW = this._aspectH = 1;

          /* Group minifying a small 1px precision problem when rotating object */
          this._container = this.createVMLNode('group');
          this._container.style.width = width;
          this._container.style.height = height;
          this._container.style.position = "absolute";
          this._container.style.top = "0px";
          this._container.style.left = "0px";
          this._container.setAttribute('coordsize', width - 1 + ',' + (height - 1)); // This -1, -1 trying to fix ugly problem with small displacement on IE
          this._container.appendChild(this._vimage);

          this._rootObj.appendChild(this._container);
          this._rootObj.style.position = "relative"; // FIXES IE PROBLEM
          this._rootObj.style.width = width + "px";
          this._rootObj.style.height = height + "px";
          this._rootObj.setAttribute('id', this._img.getAttribute('id'));
          this._rootObj.className = this._img.className;
          this._eventObj = this._rootObj;
          var parameters;
          while (parameters = this._onLoadDelegate.shift()) {
            this._handleRotation(parameters, true);
          }
        }
      else return function () {
        this._rootObj.setAttribute('id', this._img.getAttribute('id'));
        this._rootObj.className = this._img.className;

        this._imgWidth = this._img.naturalWidth;
        this._imgHeight = this._img.naturalHeight;
        var _widthMax = Math.sqrt((this._imgHeight) * (this._imgHeight) + (this._imgWidth) * (this._imgWidth));
        this._width = _widthMax * 3;
        this._height = _widthMax * 3;

        this._aspectW = this._img.offsetWidth / this._img.naturalWidth;
        this._aspectH = this._img.offsetHeight / this._img.naturalHeight;

        this._img.parentNode.removeChild(this._img);


        this._canvas = document.createElement('canvas');
        this._canvas.setAttribute('width', this._width);
        this._canvas.style.position = "relative";
        this._canvas.style.left = -this._img.height * this._aspectW + "px";
        this._canvas.style.top = -this._img.width * this._aspectH + "px";
        this._canvas.Wilq32 = this._rootObj.Wilq32;

        this._rootObj.appendChild(this._canvas);
        this._rootObj.style.width = this._img.width * this._aspectW + "px";
        this._rootObj.style.height = this._img.height * this._aspectH + "px";
        this._eventObj = this._canvas;

        this._cnv = this._canvas.getContext('2d');
        var parameters;
        while (parameters = this._onLoadDelegate.shift()) {
          this._handleRotation(parameters, true);
        }
      }
    })(),

    _animateStart: function () {
      if (this._timer) {
        clearTimeout(this._timer);
      }
      this._animateStartTime = +new Date;
      this._animateStartAngle = this._angle;
      this._animate();
    },
    _animate: function () {
      var actualTime = +new Date;
      var checkEnd = actualTime - this._animateStartTime > this._parameters.duration;

      // TODO: Bug for animatedGif for static rotation ? (to test)
      if (checkEnd && !this._parameters.animatedGif) {
        clearTimeout(this._timer);
      }
      else {
        if (this._canvas || this._vimage || this._img) {
          var angle = this._parameters.easing(0, actualTime - this._animateStartTime, this._animateStartAngle, this._parameters.animateTo - this._animateStartAngle, this._parameters.duration);
          this._rotate((~~(angle * 10)) / 10);
        }
        if (this._parameters.step) {
          this._parameters.step(this._angle);
        }
        var self = this;
        this._timer = setTimeout(function () {
          self._animate.call(self);
        }, 10);
      }

      // To fix Bug that prevents using recursive function in callback I moved this function to back
      if (this._parameters.callback && checkEnd) {
        this._angle = this._parameters.animateTo;
        this._rotate(this._angle);
        this._parameters.callback.call(this._rootObj);
      }
    },

    _rotate: (function () {
      var rad = Math.PI / 180;
      if (IE)
        return function (angle) {
          this._angle = angle;
          this._container.style.rotation = (angle % 360) + "deg";
          this._vimage.style.top = -(this._rotationCenterY - this._imgHeight / 2) + "px";
          this._vimage.style.left = -(this._rotationCenterX - this._imgWidth / 2) + "px";
          this._container.style.top = this._rotationCenterY - this._imgHeight / 2 + "px";
          this._container.style.left = this._rotationCenterX - this._imgWidth / 2 + "px";

        }
      else if (supportedCSS)
        return function (angle) {
          this._angle = angle;
          this._img.style[supportedCSS] = "rotate(" + (angle % 360) + "deg)";
          this._img.style[supportedCSSOrigin] = this._parameters.center.join(" ");
        }
      else
        return function (angle) {
          this._angle = angle;
          angle = (angle % 360) * rad;
          // clear canvas
          this._canvas.width = this._width;//+this._widthAdd;
          this._canvas.height = this._height;//+this._heightAdd;

          // REMEMBER: all drawings are read from backwards.. so first function is translate, then rotate, then translate, translate..
          this._cnv.translate(this._imgWidth * this._aspectW, this._imgHeight * this._aspectH);	// at least center image on screen
          this._cnv.translate(this._rotationCenterX, this._rotationCenterY);			// we move image back to its orginal
          this._cnv.rotate(angle);										// rotate image
          this._cnv.translate(-this._rotationCenterX, -this._rotationCenterY);		// move image to its center, so we can rotate around its center
          this._cnv.scale(this._aspectW, this._aspectH); // SCALE - if needed ;)
          this._cnv.drawImage(this._img, 0, 0);							// First - we draw image
        }

    })()
  }

  if (IE) {
    Wilq32.PhotoEffect.prototype.createVMLNode = (function () {
      document.createStyleSheet().addRule(".rvml", "behavior:url(#default#VML)");
      try {
        !document.namespaces.rvml && document.namespaces.add("rvml", "urn:schemas-microsoft-com:vml");
        return function (tagName) {
          return document.createElement('<rvml:' + tagName + ' class="rvml">');
        };
      } catch (e) {
        return function (tagName) {
          return document.createElement('<' + tagName + ' xmlns="urn:schemas-microsoft.com:vml" class="rvml">');
        };
      }
    })();
  }

})(jQuery);
